name: PR Triage

on:
    pull_request_target:
        types:
            - opened
            - edited
            - reopened
            - synchronize

permissions:
    contents: read
    pull-requests: write

concurrency:
    group: pr-${{ github.event.pull_request.number }}
    cancel-in-progress: true

jobs:
    label:
        name: Label PR
        if: github.event.action != 'edited'
        runs-on: ubuntu-latest
        steps:
            - name: Label pull request
              uses: actions/labeler@v6
              with:
                  repo-token: ${{ secrets.GITHUB_TOKEN }}
                  configuration-path: .github/pr-labeler.yml
                  dot: true
                  sync-labels: true

    validate-title:
        name: Validate title
        runs-on: ubuntu-latest
        steps:
            - name: Validate pull request title
              env:
                  TITLE: ${{ github.event.pull_request.title }}
              run: |
                  REGEX="^(revert: )?(feat|fix|docs|style|refactor|perf|test|build|ci|chore|types|infra)(\\(.+\\))?!?: .{1,72}$"

                  echo "Title: \"$TITLE\""

                  shopt -s nocasematch
                  if [[ ! "$TITLE" =~ $REGEX ]]; then
                    echo "❌ PR title does not match the required format!"
                    exit 1
                  fi